biennially

[ bahy-en-ee-uh-lee ]

Phonetic (Standard)IPA

adverb

every two years:
The general election shall be held biennially on the Tuesday following the first Monday of November in each even-numbered year.
Botany. two years after starting to grow:
The fruits are acorns, maturing biennially, and have saucer- to cup-shaped caps that cover about a quarter of the nut.

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